Home
Class 12
PHYSICS
Five bulbs, each rated at 40 W-220 V are...

Five bulbs, each rated at 40 W-220 V are used for 5 hours daily on 20 V line. How may units of electric energy is consumed in a month of 30 days?

A

20 units

B

25 units

C

15 units

D

30 units

Text Solution

Verified by Experts

The correct Answer is:
D

`("no. of watts"xx"no. of hours")/(1000)`
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 2 C.W|59 Videos
  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 2 H.W|45 Videos
  • CURRENT ELECTRICITY

    NARAYNA|Exercise Level 1 C.W|64 Videos
  • COMMUNICATION SYSTEM

    NARAYNA|Exercise Level-II(H.W)|25 Videos
  • DUAL NATURE OF RADIATION AND MATTER

    NARAYNA|Exercise ASSERTION AND REASON|15 Videos

Similar Questions

Explore conceptually related problems

A 100 W electric bulb is used for 10 hours a day. How many units of energy are consumed in 30 days?

In a house there are four bulbs each of 50W and 5 fans each of 60W. If they are used at the rate of 6 hours a day, the electrical energy consumed in a month of 30 days is

Knowledge Check

  • Five bulbs each rated as 220 V 100 W burnt 4 hours. What is the cost of electricity consumed if the rate is 50 paise per unit ?

    A
    1 Rupee
    B
    2 Rupee
    C
    4 Rupees
    D
    8 Rupees
  • How many hours must a 200 W bulb glow to consume 1 unit of electrical energy?

    A
    1
    B
    2
    C
    5
    D
    10
  • There are 5 tube-lights each of 40 W in a house. These are used on an average for 5 hours per day. In addition, there is an immersion heater of 1500 W used on an average for 1 hour per day. The nmber of units of electricity are consumed in a month is

    A
    25 units
    B
    50 units
    C
    75 units
    D
    100 units
  • Similar Questions

    Explore conceptually related problems

    A 1 k W heater is meant to operate at 200 V . (a) What is the resistance? (b) How much power will it consume if the line voltage drops to 100 V ? ( c ) How many units of electrical energy will it consume in a month ( of 30 days) if it operates 10 h daily at the specified voltage ( 200 V) ?

    A 1 kQ heater is meant to operate at 200 V. (a) what is its resistance ? (b) How much power will it consume if the line voltage drops to 100 V? (c) how many units of electrical energy will it consume in a month (of 30 days) if it operates 10 hr daily at the specified voltage?

    An electric bulb of power of power 40 W is lighted daily for 8 hours for 15 days how many units of eletric energy will be consumed? also find the amount of electric bill if the rate of electricity consumption is rs.8.00 per unit

    In a house two 60W electric bulbs are lighted for 4 hours, and three 100 W bulbs for 5 hours everyday. Calculate the electric energy consumed in 30 days.

    How many hours should a 200 W bulb glow to consume 2 units of electrical energy?